GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: inspector_js_api.cc Lines: 189 209 90.4 %
Date: 2021-10-03 04:15:53 Branches: 36 76 47.4 %

Line Branch Exec Source
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#include "base_object-inl.h"
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#include "inspector_agent.h"
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#include "inspector_io.h"
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#include "memory_tracker-inl.h"
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#include "node_external_reference.h"
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#include "util-inl.h"
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#include "v8-inspector.h"
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#include "v8.h"
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10
#include <memory>
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namespace node {
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namespace inspector {
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namespace {
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using v8::Context;
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using v8::Function;
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using v8::FunctionCallbackInfo;
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using v8::FunctionTemplate;
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using v8::Global;
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using v8::HandleScope;
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using v8::Isolate;
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using v8::Local;
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using v8::MaybeLocal;
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using v8::NewStringType;
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using v8::Object;
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using v8::String;
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using v8::Uint32;
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using v8::Value;
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31
using v8_inspector::StringBuffer;
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using v8_inspector::StringView;
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1237
std::unique_ptr<StringBuffer> ToProtocolString(Isolate* isolate,
35
                                               Local<Value> value) {
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1237
  TwoByteValue buffer(isolate, value);
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1237
  return StringBuffer::create(StringView(*buffer, buffer.length()));
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}
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struct LocalConnection {
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931
  static std::unique_ptr<InspectorSession> Connect(
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      Agent* inspector, std::unique_ptr<InspectorSessionDelegate> delegate) {
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931
    return inspector->Connect(std::move(delegate), false);
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  }
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617
  static Local<String> GetClassName(Environment* env) {
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617
    return FIXED_ONE_BYTE_STRING(env->isolate(), "Connection");
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  }
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};
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struct MainThreadConnection {
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2
  static std::unique_ptr<InspectorSession> Connect(
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      Agent* inspector, std::unique_ptr<InspectorSessionDelegate> delegate) {
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2
    return inspector->ConnectToMainThread(std::move(delegate), true);
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  }
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617
  static Local<String> GetClassName(Environment* env) {
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617
    return FIXED_ONE_BYTE_STRING(env->isolate(), "MainThreadConnection");
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  }
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};
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template <typename ConnectionType>
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class JSBindingsConnection : public AsyncWrap {
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 public:
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  class JSBindingsSessionDelegate : public InspectorSessionDelegate {
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   public:
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1866
    JSBindingsSessionDelegate(Environment* env,
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                              JSBindingsConnection* connection)
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                              : env_(env),
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1866
                                connection_(connection) {
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1866
    }
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12894
    void SendMessageToFrontend(const v8_inspector::StringView& message)
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        override {
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12894
      Isolate* isolate = env_->isolate();
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25788
      HandleScope handle_scope(isolate);
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12894
      Context::Scope context_scope(env_->context());
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      MaybeLocal<String> v8string =
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12894
          String::NewFromTwoByte(isolate, message.characters16(),
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12894
                                 NewStringType::kNormal, message.length());
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12894
      Local<Value> argument = v8string.ToLocalChecked().As<Value>();
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12894
      connection_->OnMessage(argument);
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12894
    }
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   private:
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    Environment* env_;
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    BaseObjectPtr<JSBindingsConnection> connection_;
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  };
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1866
  JSBindingsConnection(Environment* env,
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                       Local<Object> wrap,
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                       Local<Function> callback)
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                       : AsyncWrap(env, wrap, PROVIDER_INSPECTORJSBINDING),
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1866
                         callback_(env->isolate(), callback) {
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1866
    Agent* inspector = env->inspector_agent();
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1866
    session_ = ConnectionType::Connect(
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        inspector, std::make_unique<JSBindingsSessionDelegate>(env, this));
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1866
  }
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12894
  void OnMessage(Local<Value> value) {
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25788
    MakeCallback(callback_.Get(env()->isolate()), 1, &value);
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12894
  }
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2468
  static void Bind(Environment* env, Local<Object> target) {
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    Local<FunctionTemplate> tmpl =
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2468
        env->NewFunctionTemplate(JSBindingsConnection::New);
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4936
    tmpl->InstanceTemplate()->SetInternalFieldCount(
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        JSBindingsConnection::kInternalFieldCount);
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2468
    tmpl->Inherit(AsyncWrap::GetConstructorTemplate(env));
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2468
    env->SetProtoMethod(tmpl, "dispatch", JSBindingsConnection::Dispatch);
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2468
    env->SetProtoMethod(tmpl, "disconnect", JSBindingsConnection::Disconnect);
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2468
    env->SetConstructorFunction(
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        target,
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        ConnectionType::GetClassName(env),
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        tmpl);
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2468
  }
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1866
  static void New(const FunctionCallbackInfo<Value>& info) {
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1866
    Environment* env = Environment::GetCurrent(info);
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1866
    CHECK(info[0]->IsFunction());
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3732
    Local<Function> callback = info[0].As<Function>();
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1866
    new JSBindingsConnection(env, info.This(), callback);
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1866
  }
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1836
  void Disconnect() {
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1836
    session_.reset();
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1836
    delete this;
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  }
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1836
  static void Disconnect(const FunctionCallbackInfo<Value>& info) {
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    JSBindingsConnection* session;
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1836
    ASSIGN_OR_RETURN_UNWRAP(&session, info.Holder());
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1836
    session->Disconnect();
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  }
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136
2474
  static void Dispatch(const FunctionCallbackInfo<Value>& info) {
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2474
    Environment* env = Environment::GetCurrent(info);
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    JSBindingsConnection* session;
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2474
    ASSIGN_OR_RETURN_UNWRAP(&session, info.Holder());
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4948
    CHECK(info[0]->IsString());
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142
2474
    if (session->session_) {
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4948
      session->session_->Dispatch(
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4948
          ToProtocolString(env->isolate(), info[0])->string());
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    }
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  }
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148
4
  void MemoryInfo(MemoryTracker* tracker) const override {
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4
    tracker->TrackField("callback", callback_);
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4
    tracker->TrackFieldWithSize(
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        "session", sizeof(*session_), "InspectorSession");
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  }
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4
  SET_MEMORY_INFO_NAME(JSBindingsConnection)
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2
  SET_SELF_SIZE(JSBindingsConnection)
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157
  bool IsNotIndicativeOfMemoryLeakAtExit() const override {
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    return true;  // Binding connections emit events on their own.
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  }
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161
 private:
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  std::unique_ptr<InspectorSession> session_;
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  Global<Function> callback_;
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};
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166
44468
static bool InspectorEnabled(Environment* env) {
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44468
  Agent* agent = env->inspector_agent();
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44468
  return agent->IsActive();
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}
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171
617
void SetConsoleExtensionInstaller(const FunctionCallbackInfo<Value>& info) {
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617
  auto env = Environment::GetCurrent(info);
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174
617
  CHECK_EQ(info.Length(), 1);
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617
  CHECK(info[0]->IsFunction());
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1234
  env->set_inspector_console_extension_installer(info[0].As<Function>());
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617
}
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8
void CallAndPauseOnStart(const FunctionCallbackInfo<v8::Value>& args) {
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8
  Environment* env = Environment::GetCurrent(args);
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8
  CHECK_GT(args.Length(), 1);
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8
  CHECK(args[0]->IsFunction());
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14
  SlicedArguments call_args(args, /* start */ 2);
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8
  env->inspector_agent()->PauseOnNextJavascriptStatement("Break on start");
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  v8::MaybeLocal<v8::Value> retval =
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22
      args[0].As<v8::Function>()->Call(env->context(), args[1],
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16
                                       call_args.length(), call_args.out());
189
6
  if (!retval.IsEmpty()) {
190
10
    args.GetReturnValue().Set(retval.ToLocalChecked());
191
  }
192
6
}
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44462
void InspectorConsoleCall(const FunctionCallbackInfo<Value>& info) {
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44462
  Environment* env = Environment::GetCurrent(info);
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44462
  Isolate* isolate = env->isolate();
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44462
  Local<Context> context = isolate->GetCurrentContext();
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44462
  CHECK_GE(info.Length(), 2);
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44462
  SlicedArguments call_args(info, /* start */ 2);
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44462
  if (InspectorEnabled(env)) {
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44461
    Local<Value> inspector_method = info[0];
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44461
    CHECK(inspector_method->IsFunction());
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44461
    if (!env->is_in_inspector_console_call()) {
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44460
      env->set_is_in_inspector_console_call(true);
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      MaybeLocal<Value> ret =
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44460
          inspector_method.As<Function>()->Call(context,
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                                                info.Holder(),
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44460
                                                call_args.length(),
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133380
                                                call_args.out());
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44460
      env->set_is_in_inspector_console_call(false);
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44460
      if (ret.IsEmpty())
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9
        return;
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    }
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  }
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44453
  Local<Value> node_method = info[1];
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44453
  CHECK(node_method->IsFunction());
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44453
  node_method.As<Function>()->Call(context,
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                                   info.Holder(),
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44453
                                   call_args.length(),
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177812
                                   call_args.out()).FromMaybe(Local<Value>());
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}
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static void* GetAsyncTask(int64_t asyncId) {
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  // The inspector assumes that when other clients use its asyncTask* API,
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  // they use real pointers, or at least something aligned like real pointer.
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  // In general it means that our task_id should always be even.
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  //
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  // On 32bit platforms, the 64bit asyncId would get truncated when converted
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  // to a 32bit pointer. However, the javascript part will never enable
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  // the async_hook on 32bit platforms, therefore the truncation will never
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  // happen in practice.
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21
  return reinterpret_cast<void*>(asyncId << 1);
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}
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template <void (Agent::*asyncTaskFn)(void*)>
237
36
static void InvokeAsyncTaskFnWithId(const FunctionCallbackInfo<Value>& args) {
238
36
  Environment* env = Environment::GetCurrent(args);
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36
  CHECK(args[0]->IsNumber());
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36
  int64_t task_id = args[0]->IntegerValue(env->context()).FromJust();
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36
  (env->inspector_agent()->*asyncTaskFn)(GetAsyncTask(task_id));
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36
}
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244
3
static void AsyncTaskScheduledWrapper(const FunctionCallbackInfo<Value>& args) {
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3
  Environment* env = Environment::GetCurrent(args);
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247
6
  CHECK(args[0]->IsString());
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6
  Local<String> task_name = args[0].As<String>();
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6
  String::Value task_name_value(args.GetIsolate(), task_name);
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3
  StringView task_name_view(*task_name_value, task_name_value.length());
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252
3
  CHECK(args[1]->IsNumber());
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3
  int64_t task_id = args[1]->IntegerValue(env->context()).FromJust();
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3
  void* task = GetAsyncTask(task_id);
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256
3
  CHECK(args[2]->IsBoolean());
257
3
  bool recurring = args[2]->BooleanValue(args.GetIsolate());
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259
3
  env->inspector_agent()->AsyncTaskScheduled(task_name_view, task, recurring);
260
3
}
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262
5432
static void RegisterAsyncHookWrapper(const FunctionCallbackInfo<Value>& args) {
263
5432
  Environment* env = Environment::GetCurrent(args);
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265
5432
  CHECK(args[0]->IsFunction());
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10864
  Local<Function> enable_function = args[0].As<Function>();
267
5432
  CHECK(args[1]->IsFunction());
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5432
  Local<Function> disable_function = args[1].As<Function>();
269
5432
  env->inspector_agent()->RegisterAsyncHook(env->isolate(),
270
    enable_function, disable_function);
271
5432
}
272
273
6
void IsEnabled(const FunctionCallbackInfo<Value>& args) {
274
6
  Environment* env = Environment::GetCurrent(args);
275
6
  args.GetReturnValue().Set(InspectorEnabled(env));
276
6
}
277
278
void Open(const FunctionCallbackInfo<Value>& args) {
279
  Environment* env = Environment::GetCurrent(args);
280
  Agent* agent = env->inspector_agent();
281
282
  if (args.Length() > 0 && args[0]->IsUint32()) {
283
    uint32_t port = args[0].As<Uint32>()->Value();
284
    ExclusiveAccess<HostPort>::Scoped host_port(agent->host_port());
285
    host_port->set_port(static_cast<int>(port));
286
  }
287
288
  if (args.Length() > 1 && args[1]->IsString()) {
289
    Utf8Value host(env->isolate(), args[1].As<String>());
290
    ExclusiveAccess<HostPort>::Scoped host_port(agent->host_port());
291
    host_port->set_host(*host);
292
  }
293
294
  agent->StartIoThread();
295
}
296
297
void WaitForDebugger(const FunctionCallbackInfo<Value>& args) {
298
  Environment* env = Environment::GetCurrent(args);
299
  Agent* agent = env->inspector_agent();
300
  if (agent->IsActive())
301
    agent->WaitForConnect();
302
  args.GetReturnValue().Set(agent->IsActive());
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}
304
305
6
void Url(const FunctionCallbackInfo<Value>& args) {
306
6
  Environment* env = Environment::GetCurrent(args);
307
6
  std::string url = env->inspector_agent()->GetWsUrl();
308
6
  if (url.empty()) {
309
1
    return;
310
  }
311
10
  args.GetReturnValue().Set(OneByteString(env->isolate(), url.c_str()));
312
}
313
314
617
void Initialize(Local<Object> target, Local<Value> unused,
315
                Local<Context> context, void* priv) {
316
617
  Environment* env = Environment::GetCurrent(context);
317
318
  v8::Local<v8::Function> consoleCallFunc =
319
617
      env->NewFunctionTemplate(InspectorConsoleCall, v8::Local<v8::Signature>(),
320
                               v8::ConstructorBehavior::kThrow,
321
617
                               v8::SideEffectType::kHasSideEffect)
322
617
          ->GetFunction(context)
323
617
          .ToLocalChecked();
324
617
  auto name_string = FIXED_ONE_BYTE_STRING(env->isolate(), "consoleCall");
325
1234
  target->Set(context, name_string, consoleCallFunc).Check();
326
617
  consoleCallFunc->SetName(name_string);
327
328
617
  env->SetMethod(
329
      target, "setConsoleExtensionInstaller", SetConsoleExtensionInstaller);
330
617
  env->SetMethod(target, "callAndPauseOnStart", CallAndPauseOnStart);
331
617
  env->SetMethod(target, "open", Open);
332
617
  env->SetMethodNoSideEffect(target, "url", Url);
333
617
  env->SetMethod(target, "waitForDebugger", WaitForDebugger);
334
335
617
  env->SetMethod(target, "asyncTaskScheduled", AsyncTaskScheduledWrapper);
336
617
  env->SetMethod(target, "asyncTaskCanceled",
337
      InvokeAsyncTaskFnWithId<&Agent::AsyncTaskCanceled>);
338
617
  env->SetMethod(target, "asyncTaskStarted",
339
      InvokeAsyncTaskFnWithId<&Agent::AsyncTaskStarted>);
340
617
  env->SetMethod(target, "asyncTaskFinished",
341
      InvokeAsyncTaskFnWithId<&Agent::AsyncTaskFinished>);
342
343
617
  env->SetMethod(target, "registerAsyncHook", RegisterAsyncHookWrapper);
344
617
  env->SetMethodNoSideEffect(target, "isEnabled", IsEnabled);
345
346
617
  JSBindingsConnection<LocalConnection>::Bind(env, target);
347
617
  JSBindingsConnection<MainThreadConnection>::Bind(env, target);
348
617
}
349
350
}  // namespace
351
352
4853
void RegisterExternalReferences(ExternalReferenceRegistry* registry) {
353
4853
  registry->Register(InspectorConsoleCall);
354
4853
  registry->Register(SetConsoleExtensionInstaller);
355
4853
  registry->Register(CallAndPauseOnStart);
356
4853
  registry->Register(Open);
357
4853
  registry->Register(Url);
358
4853
  registry->Register(WaitForDebugger);
359
360
4853
  registry->Register(AsyncTaskScheduledWrapper);
361
4853
  registry->Register(InvokeAsyncTaskFnWithId<&Agent::AsyncTaskCanceled>);
362
4853
  registry->Register(InvokeAsyncTaskFnWithId<&Agent::AsyncTaskStarted>);
363
4853
  registry->Register(InvokeAsyncTaskFnWithId<&Agent::AsyncTaskFinished>);
364
365
4853
  registry->Register(RegisterAsyncHookWrapper);
366
4853
  registry->Register(IsEnabled);
367
368
4853
  registry->Register(JSBindingsConnection<LocalConnection>::New);
369
4853
  registry->Register(JSBindingsConnection<LocalConnection>::Dispatch);
370
4853
  registry->Register(JSBindingsConnection<LocalConnection>::Disconnect);
371
4853
  registry->Register(JSBindingsConnection<MainThreadConnection>::New);
372
4853
  registry->Register(JSBindingsConnection<MainThreadConnection>::Dispatch);
373
4853
  registry->Register(JSBindingsConnection<MainThreadConnection>::Disconnect);
374
4853
}
375
376
}  // namespace inspector
377
}  // namespace node
378
379
4926
NODE_MODULE_CONTEXT_AWARE_INTERNAL(inspector,
380
                                  node::inspector::Initialize)
381
4853
NODE_MODULE_EXTERNAL_REFERENCE(inspector,
382
                               node::inspector::RegisterExternalReferences)